1 /******************************************************************************* 2 * Copyright 2003-2018 Intel Corporation 3 * All Rights Reserved. 4 * 5 * If this software was obtained under the Intel Simplified Software License, 6 * the following terms apply: 7 * 8 * The source code, information and material ("Material") contained herein is 9 * owned by Intel Corporation or its suppliers or licensors, and title to such 10 * Material remains with Intel Corporation or its suppliers or licensors. The 11 * Material contains proprietary information of Intel or its suppliers and 12 * licensors. The Material is protected by worldwide copyright laws and treaty 13 * provisions. No part of the Material may be used, copied, reproduced, 14 * modified, published, uploaded, posted, transmitted, distributed or disclosed 15 * in any way without Intel's prior express written permission. No license under 16 * any patent, copyright or other intellectual property rights in the Material 17 * is granted to or conferred upon you, either expressly, by implication, 18 * inducement, estoppel or otherwise. Any license under such intellectual 19 * property rights must be express and approved by Intel in writing. 20 * 21 * Unless otherwise agreed by Intel in writing, you may not remove or alter this 22 * notice or any other notice embedded in Materials by Intel or Intel's 23 * suppliers or licensors in any way. 24 * 25 * 26 * If this software was obtained under the Apache License, Version 2.0 (the 27 * "License"), the following terms apply: 28 * 29 * You may not use this file except in compliance with the License. You may 30 * obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 31 * 32 * 33 * Unless required by applicable law or agreed to in writing, software 34 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 35 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 36 * 37 * See the License for the specific language governing permissions and 38 * limitations under the License. 39 *******************************************************************************/ 40 41 /* 42 // 43 // Purpose: 44 // Cryptography Primitive. 45 // EC over Prime Finite Field (initialization) 46 // 47 // Contents: 48 // ippsECCPInit() 49 // 50 */ 51 52 #include "owndefs.h" 53 #include "owncp.h" 54 #include "pcpeccp.h" 55 56 /*F* 57 // Name: ippsECCPInit 58 // 59 // Purpose: Init ECC context. 60 // 61 // Returns: Reason: 62 // ippStsNullPtrErr NULL == pEC 63 // 64 // ippStsSizeErr 2>feBitSize 65 // feBitSize>EC_GFP_MAXBITSIZE 66 // ippStsNoErr no errors 67 // 68 // Parameters: 69 // feBitSize size of field element (bits) 70 // pEC pointer to the ECC context 71 // 72 *F*/ 73 IPPFUN(IppStatus, ippsECCPInit, (int feBitSize, IppsECCPState* pEC)) 74 { 75 /* test pEC pointer */ 76 IPP_BAD_PTR1_RET(pEC); 77 /* use aligned EC context */ 78 pEC = (IppsECCPState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); 79 80 /* test size of field element */ 81 IPP_BADARG_RET((2>feBitSize || feBitSize>EC_GFP_MAXBITSIZE), ippStsSizeErr); 82 83 { 84 /* size of GF context */ 85 //int gfCtxSize = cpGFpGetSize(feBitSize); 86 int gfCtxSize = cpGFpGetSize(feBitSize, feBitSize+BITSIZE(BNU_CHUNK_T), GFP_POOL_SIZE); 87 /* size of EC context */ 88 int ecCtxSize = cpGFpECGetSize(1, feBitSize); 89 90 IppsGFpState* pGF = (IppsGFpState*)(IPP_ALIGNED_PTR((Ipp8u*)pEC+ecCtxSize, GFP_ALIGNMENT)); 91 BNU_CHUNK_T* pScratchBuffer = (BNU_CHUNK_T*)IPP_ALIGNED_PTR((Ipp8u*)pGF+gfCtxSize, CACHE_LINE_SIZE); 92 93 /* set up contexts */ 94 IppStatus sts; 95 do { 96 sts = cpGFpInitGFp(feBitSize, pGF); 97 if(ippStsNoErr!=sts) break; 98 sts = ippsGFpECInit(pGF, NULL, NULL, pEC); 99 } while (0); 100 101 /* save scratch buffer pointer */ 102 ECP_SBUFFER(pEC) = pScratchBuffer; 103 104 return sts; 105 } 106 } 107